Data transmission using MODBUS Protocol. Serial Communications and via TCP/IP. MODBUS RTU ASCII Modus. Functions list.
Some SuperCom - MODBUS Functions
The SuperCom MODBUS Protocol Module implements the MODBUS protocol and covers functions from the protocol specification (MODBUS function codes: 1, 2, 3, 4, 5, 6, 7, 15, 16, 17, 20, 21, 22, 23, 24). It also supports custom function codes and data packets by implementing functions that communicate transparently.
Following a list of some functions of the SuperCom MODBUS Protocol Module.
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RS_MBGetConfig |
Retrieve the protocol module configuration |
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RS_MBSetConfig |
Change the protocol module configuration |
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RS_MBReadCoil |
Read values of a single coils |
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RS_MBReadCoils |
Read the values of a sequence of coils |
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RS_MBReadInput |
Read the values (bits) of one or more discrete Input bits |
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RS_MBReadInputRegisters |
Read a sequence of Input Registers |
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RS_MBReadHoldingRegisters |
Read a sequence of Holding Registers |
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RS_MBWriteCoil |
Set the value of a single coil |
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RS_MBWriteCoils |
Set the value of a sequence of coil |
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RS_MBWriteRegister |
Set the value of a single register |
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RS_MBWriteRegisters |
Set the value of a sequence of registers |
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RS_RXMODBUS |
Receive a data packet according to the MODBUS protocol specification. Data packets received are handed over transparently. Using this function it is possible to receive custom requests, build a MODBUS slave, a MODBUS to "other protocol" converter or gateway, etc. |
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RS_TXMODBUS |
Transmit a data packet according to the MODBUS protocol specification. Using this function it is possible to transmit responds to custom requests (e.g. custom function codes), build a MODBUS slave, a MODBUS to "other protocol" converter or gateway, etc. |
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RS_MBHandleRequests |
Handle Master requests - Simulate a MODBUS Slave. |
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RS_MBSetPLCMemory |
Defines and populates a memory area in order to simulate a PLC (simulation of a MODBUS Slave). |
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With the SuperCom MODBUS Protocol Module there is only one API to learn! The same functions and parameters used with serial, TCP/IP or ISDN type of connections.
